"There
is a three or four year cycle of spending on remote access versus site-to-site in general, where one is on the rise while the other falls, but the
introduction of SSL VPNs has introduced an extended period of growth for
remote access VPN services."

SSL-VPNs offer the promise of simple remote access connectivity since from
an end user standpoint they typically involve just a Web browser to access a
corporate network.

They differ from their principal technology competitor
IPSec VPNs in that IPSec typically requires an additional client
application.

Earlier this year, Infonetics reported
that IPSec is currently dominant though losing ground
over the next few years to SSL-VPN-based VPNs .

In this
most recent report, Wilson has pegged IPSec revenue as declining every year
through 2009, while SSL-VPN and MPLS (Multi-Protocol Layer Switching)
and MPLS/IPSec revenues rise.

Though security is a key concern that helps drive VPN growth, there are
other drivers, as well.

"For VPNs the driving factors are the continued rollout of MPLS, the
continued distribution of companies (spreading out, becoming more and more
decentralized), and the increased need to have company information available
at all times from all locations to maintain a competitive edge," Wilson said.

Infonetics' report also sizes the managed security market, which it values at
$5 billion in 2005.

Nearly half the revenue comes from large organizations,
with medium-sized outfits accounting for a third and small companies only by 21
percent. The managed security market is expected to grow to $8 billion by
2009.